期刊
NANO LETTERS
卷 21, 期 18, 页码 7595-7601出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c02105
关键词
AFM; single-molecules; ultrastrong bond; Staphylococcus; Aap; vWF; physical stress; mechanoregulation; catch-bond
类别
资金
- European Research Council (ERC) under the European Union [693630]
- National Fund for Scientific Research (FNRS)
- Research Department of the Communaute francaise de Belgique (Concerted Research Action)
- Fondazione CARIPLO [2009-3546]
- European Research Council (ERC) [693630] Funding Source: European Research Council (ERC)
This study demonstrates that Staphylococci bind to von Willebrand Factor, causing endovascular infections. The protein Aap from Staphylococcus epidermidis binds to vWF with an ultrastrong force, activated by tensile loading, through specific domains, offering promise for innovative antistaphylococcal therapies.
Staphylococci bind to the blood protein von Willebrand Factor (vWF), thereby causing endovascular infections. Whether and how this interaction occurs with the medically important pathogen Staphylococcus epidermidis is unknown. Using single-molecule experiments, we demonstrate that the S. epidermidis protein Aap binds vWF via an ultrastrong force, similar to 3 nN, the strongest noncovalent biological bond ever reported, and we show that this interaction is activated by tensile loading, suggesting a catch-bond behavior. Aap-vWF binding involves exclusively the A1 domain of vWF but requires both the A and B domains of Aap, as revealed by inhibition assays using specific monoclonal antibodies. Collectively, our results point to a mechanism where force-induced unfolding of the B repeats activates the A domain of Aap, shifting it from a weak- to a strong-binding state, which then engages into an ultrastrong interaction with vWF A1. This shear-dependent function of Aap offers promise for innovative antistaphylococcal therapies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据